Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c00858cfd0152c2…

MALICIOUS

PDF

83.9 KB Created: 2021-08-14 02:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ddb225c315c3b017bf81daf3d91b07aa SHA-1: 02a66655f492aac0da05c4925ad1fa1c0d8e9033 SHA-256: 4c00858cfd0152c2774d05501d06edc661ead0b88d446c49a5a0ae1b54ee7d30
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3353

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/628335bef789187f89460b6431484d0d/7360132621.pdf In PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094232e3346e---giludo.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/bugisutodudisoribev.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/a5h0b7336jvak0upj09iomv001/jewuvuxiruxe.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/takikixuxajijatuke.pdfIn PDF document text
    • http://yocarbroker.com/upload/ckfinder/files/33072409473.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/0fb2bf6f705bb30a3195439666c6bf82/66818045022.pdfIn PDF document text
    • http://pololanna.com/user_img/files/52709345176.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/disex.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fa0cd9b1f---paperumawisimodofufu.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/4980367082.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/do62j95kc8528726nshhhsjao2/55446027459.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/vesevafasurufotufiba.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/92221307047.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7752c1247c---siron.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/pikurudutida.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/20732797376.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/89n4q7k2rnuv7idvgl2kepg9el/wibiramodibisuzibito.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfe15db5cb---wunewegosimizotudojerad.pdfIn PDF document text
    • https://eternalbliss.net/file/sopawagazod.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/mesonu.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a2faca66935---ragos.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/37878982366.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/49479382955.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/50934699297.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/gomanoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=hill+climb+racing+money+hack+iphonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 17224 bytes
SHA-256: 2d3a6b25d6f620cafa351e5feaa646050c4f9d390a302eba7a7ad9918ff6db33
font_01_sfnt_off000128fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FB 10892 bytes
SHA-256: c7ad921ba67528811345c91312f38d48aaa862d54b095daf9f6998e4340b42b6